Quick, snappy trigger action, which requires only 3 to 4 Ibs. of finger pressure, is possible by slight alterations. Less than 3 Ibs. pressure cannot be regarded as safe. Fig. 1 shows the most common trigger-and-hammer assembly. When the angle between sear point and hammer notch is as shown by the dotted lines at A of Fig. 1, the trigger pulls hard. By reshaping the parts as at B, the trigger works too easily which is unsafe, but if shaped as in detail C, it will work smoothly, quickly and safely. If the hammer notch is too deep, resulting in a long, slow pull, don't file away the front of it. It is much better to “pin” the hammer with a small piece of drill rod, as indicated in Fig. 2. Fig. 3 shows the usual bolt-action type of firing mechanism. To reduce the pull, polish adjacent surfaces of the sear point and cocking piece along line AB. Be sure not to grind either point shorter, and do not bevel or round these surfaces, or the gun may discharge accidentally. Most bolt actions have a double pull for safety. In Fig. 4, the hump A, bearing against the underside of the receiver, is the fulerum for the first two thirds of the trigger movement, drawing the sear point down out of cocking-piece notch, after which hump B becomes the fulcrum. If you don't like a double pull, grind off hump A. Fig. 5 shows the change for British Lee-Enfield system. Never attempt stoning or grinding on any guns having sensitive firing mechanisms. Triggers of the kind shown in Fig. 6 can be improved. The original trigger is cut off and changed into a sear and a new trigger with double fulerum B and C is attached by pin A. Triggers of shotguns usually do not require much attention. When they must be lightened, however, the general principles explained in Fig. 1 usually will apply regardless of the type of action. For weighting trigger pull, spring scales are sometimes employed, but they quite often are inaccurate. A trigger weight made by soldering a wire hook to a small tin can, Fig. 7, is better for this purpose. The can is filled with shot or sand to exact weight required.